Eductor for ventilating internal-combustion engines



March 5., 1929. ERr 1.704297 EDUGTOR FOR VENTILATING INTERNAL COMBUSTIONENGINES Filfid April 6, 1927 'illllll: mm

i; ATTORNEYS Patented Mar. 1929.

* UNITED STATES AUGUST H. LEIPEBT, OF COLLEGE POINT, NEW YORK, ASSIGNORTO INTERNATIONAL MOTOR COMPANY, OF NEW YORK, N. Y., A CORPORATION OFDELAWARE.

1,704,z91 PATENT OFFICE.

EDUCTOR FOR VENTILATING INTERNAL-COMBUSTION Application filed April 6,

In the design of a motor vehicle chassis, due consideration must begiven to the apparatus for cooling the engine and the most widely usedmethod is that of circulating a liquid within the cylinder block andthrough a radiator toefiect the cooling thereof. If the radiator isplaced at the front of the car, little diiiiculty is had in sufficientlycoolingthefluid, since a fan, operated from the crank shaft, can e usedto'great advantage in back of the radiator. Where, however, the radiatorconsists of two vertical .columns at either side of the engine and tothe rear thereof, the problem of'providing an adequate circulation ofair through the radiator elements becomes more acute.

' The usual method of using a squirrel cage fan on the crank shaft, orextension thereof, is one way in which the circulation of cooling airmay be effected and the presentinvention deals with another method ofac- I had.

coinplishing this result wherein the exhaust gases are used and, bymeans of suitable Venturi throats, a desired circulation may be I Anobject of the present invention is to provide a means for circulatingcooling air through the radiator of a vehicle by creating a suction withthe exhaust gases. The structure by which this is accomplishedeliminates considerable weight as well as reduces the number of rotatingparts. In addition tov simplifying the design, the clearance between thechassis and road bed is increased.

A further object of this invention is'to adapt a circulating system ofthe improved type noted above to circulate cooling air throughradiatorelements disposed at the rear, and at either side of the engine.

Reference will-now be had to the accom- .panying drawings forming a parthereof for a more detailed description of the invention, wherein:

Figure 1 is'a side elevation, partly in section, showing a vehicle witha circulating system constructed in accordance with the 'presentinvention.

Figure2 is a section taken on the line 2-2 of Figure 1 and, lookinginthe direction of the arrows. I

Figure 3 is a view in section through a radiator and showing a modifiedform of the invention.

Referring particularly to the drawings, a

1927. Serial N0. 181,807.

indicates the engine of a motor vehicle with an exhaust line a. Thisline extends downwardly, in one form, and carries a nozzle a whichextends Within a housing'd to be described later. The hood ofthe engineis in dicated diagrammatically at b and the radiator at 0. The radiatoris mounted at the rear of the engine'and carries two sections of watertubes 0' and c at either side thereof. Between the sections, bafiles 0are provided to direct the flow of'air and produce a desired rate offlow along the various sections of the tubes.

At the bottom of the radiator a housing 11 is-provided to direct theflow of air through the exhaust neck d of the housing. A tapered exhaustline (i may be provided .to give an added Venturi effect as well asdeaden the noise of the exhaust to some ex-' tent. f

The nozzle a directs the exhaust gases I into Venturi sections 6 whichmay be'secured to the housing (Z by means of suitable straps f and byreason of the suction created by the flow of exhaust gases throu h thesuccessive Venturi throats the air wi 1 be drawn through the coolingtubes and carried out the exhaust line to produce the necessarycoolingeffect upon the cooling liquid,

In Figure .3 a modified form is shown wherein inner and outer pairs ofbafiies g and h are used. Between the respectivesides of each pair isformed a Venturi throat and the exhaust line a is divided into .twobranches 2', each having nozzles z" disposed within the Ventu'ri'throats. The battles carry the currents of air down to housing y fromwhich they flow through opening j into a suitable exhaust line.

The use of the Venturi effect with exhaust gases is shown to be old andsuch mechanisms are not intended to be covered'in this application. Itis, however, the specific structure, adapting the exhaust Venturifeatures to radiators of the above construction to which the presentinvention is directed and obvious variations in the arrangement of partsto suit individual constructions are understood as falling within thescope'of the invention as defined in the appended claim.

What I claim is:

In a device for facilitating the flow of,

tions disposed rearwardly of the "engine, an

from the radiator sections to the exhaust 5 line, said means includingbafiles constructed V to form throats through which the cooling airpasses, aplurality of nozzlesconnected T to the exhaust pipe, and meansfor mount- 4 v ing them in the'throats to-direct the exhaust.

gases downwardly therethrough, whereby v the cooling air is drawnthrough theradiator sections by the suction. produced thereby.

This specification signed this lstday of April, A. D. 1927.

AUGUSTH. LEIIERI.

